{"title":"4-1\/2\" Grinding Wheels for Angle Grinders","description":"\u003cp\u003e4-1\/2 inch grinding wheels and grinding discs for angle grinders with a 7\/8 inch arbor. The range covers 1\/4 inch depressed center wheels for weld grinding and edge beveling, 1\/8 inch flexible wheels for grinding and finishing, and a 1\/8 inch wheel that both cuts and grinds, for fabricators, welders and maintenance crews working on steel and stainless steel.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e4-1\/2 x 1\/4 x 7\/8 inch depressed center (Type 27) wheels in aluminum oxide, in packs of 5 or 25.\u003c\/li\u003e\n\u003cli\u003e4-1\/2 x 1\/8 x 7\/8 inch flexible grinding wheels in 60 grit zirconia or 80 grit zirconia and aluminum oxide, in packs of 10.\u003c\/li\u003e\n\u003cli\u003e4-1\/2 x 1\/8 x 7\/8 inch cutting and grinding wheel with double fibreglass mesh, in packs of 25, for cutting and light grinding.\u003c\/li\u003e\n\u003cli\u003eListed for steel and stainless steel, with cast iron on the cutting and grinding wheel and non-ferrous metals on the flexible wheels.\u003c\/li\u003e\n\u003cli\u003eUses include weld grinding, weld removal, edge beveling, surface prep and finishing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eWhich 4-1\/2 inch grinding wheel should I use?\u003c\/h3\u003e\u003cp\u003ePick by the job. The 1\/4 inch depressed center wheels handle stock removal, weld grinding and edge beveling. The 1\/8 inch flexible wheels cover grinding and finishing in 80 grit, and weld removal, beveling and surface prep in 60 grit. The 1\/8 inch cutting and grinding wheel suits jobs that need a cut and some light grinding with one wheel.\u003c\/p\u003e\u003ch3\u003eIs a 4.5 grinding disc the same as a 4-1\/2 inch grinding wheel?\u003c\/h3\u003e\u003cp\u003eYes. 4.5 inch, 4-1\/2 inch and 115 mm describe the same size, and people say grinding disc or grinding wheel for the same product. All wheels here have a 7\/8 inch (22 mm) arbor hole and fit 4-1\/2 inch angle grinders.\u003c\/p\u003e\u003ch3\u003eWhat does 4-1\/2 x 1\/4 x 7\/8 mean on a grinding wheel?\u003c\/h3\u003e\u003cp\u003eThe three numbers are diameter, thickness and arbor hole, in inches. A 4-1\/2 x 1\/4 x 7\/8 wheel is 4-1\/2 inches across, 1\/4 inch thick and mounts on a 7\/8 inch arbor. In this collection the 1\/4 inch wheels are for grinding, and the 1\/8 inch wheels are flexible grinding wheels or a combination cutting and grinding wheel.\u003c\/p\u003e\u003ch3\u003eCan I grind with a 4-1\/2 inch cutting disc?\u003c\/h3\u003e\u003cp\u003eOnly if the wheel is listed for grinding. The 1\/8 inch cutting and grinding wheel in this collection is listed for cutting and light grinding, so it can do both. Whatever the wheel, never exceed the maximum RPM marked on it: here that is 12,250 RPM on the 80 grit flexible wheel and 13,300 RPM on the others.\u003c\/p\u003e\u003cp\u003eSee all sizes in \u003ca href=\"\/collections\/grinding\"\u003eGrinding Discs\u003c\/a\u003e. To choose a wheel, read the \u003ca href=\"\/blogs\/news\/grinding-wheel-buying-guide\"\u003egrinding wheel buying guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/news\/can-you-grind-with-a-cutting-disc\"\u003ewhether you can grind with a cutting disc\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"wa-5pcs-4-1-2-x1-4-x7-8-depressed-center-grinding-wheels-for-angle-grinder-metalworking-grinding-disc-4-1-2-inch-diameter-1-4-thickness-7-8-arbor-upgraded","title":"4-1\/2\" x 1\/4\" x 7\/8\" Depressed Center Grinding Wheels for Metal","description":"\u003cp class=\"wa-rating-line\"\u003e\u003cstrong\u003eCustomer rating:\u003c\/strong\u003e 4.6 out of 5 from 144 customer ratings on our online marketplace store (November 2026).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHIGH QUALITY - High-grain concentration for aggressive grinding action and smoothly running wheels.\u003c\/li\u003e\n\u003cli\u003eMATERIAL - Aluminum oxide grain construction ensures long wheel life and high material removal.\u003c\/li\u003e\n\u003cli\u003eSIZE - 4 1\/2\" diameter, 1\/4\" thickness, 7\/8\" arbor (115 mm x 6 mm x 22mm)\u003c\/li\u003e\n\u003cli\u003ePACKAGE - 5 PCS\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What are these grinding wheels for?\u003c\/strong\u003e\u003cbr\u003eA: Fast stock removal, weld grinding, edge beveling, and surface prep on metal and stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I cut with a grinding wheel?\u003c\/strong\u003e\u003cbr\u003eA: No — use a cut-off wheel for cutting. Grinding wheels are for grinding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: 4-1\/2\" angle grinders with a 7\/8\" arbor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is a depressed-center wheel?\u003c\/strong\u003e\u003cbr\u003eA: The offset center lets you grind at an angle while keeping the nut clear of the work.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"5 PC","offer_id":47870706680029,"sku":null,"price":14.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/2e83bed5.jpg?v=1777666713"},{"product_id":"wa-grinder-25pack-4-1-2-x1-4-x7-8-industrial-grade-depressed-center-grinding-wheels-for-angle-grinder-grinding-disc-4-1-2-diameter-1-4-thickness-7-8-arbor-black","title":"4-1\/2\" x 1\/4\" x 7\/8\" Depressed Center Grinding Wheels for Metal (Black)","description":"\u003cp class=\"wa-rating-line\"\u003e\u003cstrong\u003eCustomer rating:\u003c\/strong\u003e 4.2 out of 5 from 25 customer ratings on our online marketplace store (November 2026).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHIGH QUALITY - High-grain concentration for aggressive grinding action and smoothly running wheels.\u003c\/li\u003e\n\u003cli\u003eMATERIAL - Aluminum oxide grain construction ensures long wheel life and high material removal.\u003c\/li\u003e\n\u003cli\u003eSIZE - 4 1\/2\" diameter, 1\/4\" thickness, 7\/8\" arbor (115 mm x 6 mm x 22mm), industrial grade.\u003c\/li\u003e\n\u003cli\u003ePACKAGE - 25 PCS.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What are these grinding wheels for?\u003c\/strong\u003e\u003cbr\u003eA: Fast stock removal, weld grinding, edge beveling, and surface prep on metal and stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I cut with a grinding wheel?\u003c\/strong\u003e\u003cbr\u003eA: No — use a cut-off wheel for cutting. Grinding wheels are for grinding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: 4-1\/2\" angle grinders with a 7\/8\" arbor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is a depressed-center wheel?\u003c\/strong\u003e\u003cbr\u003eA: The offset center lets you grind at an angle while keeping the nut clear of the work.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"25 PC","offer_id":47870708908253,"sku":"GAODP4578IND","price":49.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/aad2e954.jpg?v=1777666820"},{"product_id":"wa-grinder-25pack-4-1-2-x1-4-x7-8-depressed-center-grinding-wheel-for-angle-grinder-metalworking-grinding-disc-4-1-2-inch-diameter-1-4-inch-thickness-7-8-inch-arbor-red","title":"4-1\/2\" x 1\/4\" x 7\/8\" Depressed Center Grinding Wheels for Metal (Red)","description":"\u003cp class=\"wa-rating-line\"\u003e\u003cstrong\u003eCustomer rating:\u003c\/strong\u003e 4.5 out of 5 from 45 customer ratings on our online marketplace store (November 2026).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHIGH QUALITY - High-grain concentration for aggressive grinding action and smoothly running wheels.\u003c\/li\u003e\n\u003cli\u003eMATERIAL - Aluminum oxide grain construction ensures long wheel life and high material removal.\u003c\/li\u003e\n\u003cli\u003eSIZE - 4 1\/2\" diameter, 1\/4\" thickness, 7\/8\" arbor (115 mm x 6 mm x 22mm).\u003c\/li\u003e\n\u003cli\u003ePACKAGE - 25 PCS.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What are these grinding wheels for?\u003c\/strong\u003e\u003cbr\u003eA: Fast stock removal, weld grinding, edge beveling, and surface prep on metal and stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I cut with a grinding wheel?\u003c\/strong\u003e\u003cbr\u003eA: No — use a cut-off wheel for cutting. Grinding wheels are for grinding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: 4-1\/2\" angle grinders with a 7\/8\" arbor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is a depressed-center wheel?\u003c\/strong\u003e\u003cbr\u003eA: The offset center lets you grind at an angle while keeping the nut clear of the work.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"25 PC","offer_id":47870709235933,"sku":"H7-OI20-F3MI","price":31.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/78356914.jpg?v=1777666736"},{"product_id":"wa-grinder-25pack-4-1-2-x-1-8-x-7-8-cutting-grinding-wheel-4-5-inch-for-angle-grinder-depressed-center-general-purpose-metal-cut-off-wheel-for-metal-iron-steel-t42-25pack-4-1-2-inch","title":"4-1\/2\" x 1\/8\" x 7\/8\" Cutting \u0026 Grinding Wheels for Metal \u0026 Stainless Steel","description":"\u003cp\u003eWhitby Abrasives 4 1\/2\" depressed center cut-off wheels are designed for cutting and light grinding on mild steel, structural steel, and ferrous materials. This listing is a 25-pack of T42 discs for angle grinders with a 7\/8\" arbor.\u003c\/p\u003e\u003cp\u003eThe 1\/8\" disc thickness is suited for general-purpose cutting on structural steel, angle iron, and flat bar. These wheels are a practical choice for fabrication shops, maintenance teams, and contractors handling a variety of steel cutting tasks.\u003c\/p\u003e\u003cp\u003eEach disc is made with premium aluminum oxide abrasive grain for sharp cutting performance and double fiberglass mesh reinforcement for added strength and safety.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1\/8\" thickness suitable for general-purpose cutting and light grinding\u003c\/li\u003e\n\u003cli\u003eT42 depressed center profile allows flush and off-angle cuts\u003c\/li\u003e\n\u003cli\u003ePremium aluminum oxide abrasive grain for reliable, consistent performance\u003c\/li\u003e\n\u003cli\u003eDouble fiberglass mesh reinforcement for increased strength and safety\u003c\/li\u003e\n\u003cli\u003eVersatile disc for production shops and fabrication use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003emild and structural steel\u003c\/li\u003e\n\u003cli\u003estainless steel and cast iron\u003c\/li\u003e\n\u003cli\u003epipes, tubing, and sheet metal\u003c\/li\u003e\n\u003cli\u003eangle iron and flat bar\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What can I cut with these wheels?\u003c\/strong\u003e\u003cbr\u003eA: Mild and structural steel, stainless steel, pipe, angle iron, and bar stock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I grind with a cut-off wheel?\u003c\/strong\u003e\u003cbr\u003eA: These T42 discs are designed primarily for cutting and light grinding; for heavy grinding use a dedicated grinding wheel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: 4-1\/2\" angle grinders with a 7\/8\" arbor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Are these reinforced?\u003c\/strong\u003e\u003cbr\u003eA: Yes — double fiberglass mesh reinforcement adds strength and safety.\u003c\/p\u003e\u003ch2\u003eSafety\u003c\/h2\u003e\u003cp\u003eAlways wear proper eye, face, hand, hearing, and body protection. Use only with compatible tools, guards, and operating speeds, and confirm the tool speed does not exceed the maximum RPM marked on the wheel. Inspect each wheel before use; never use a cracked, dropped, or damaged wheel. Follow the tool manufacturer's instructions and ANSI B7.1 abrasive wheel safety practices.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"25 PC","offer_id":47870712119517,"sku":"XM-NTT1-D5DO","price":21.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/f011412f.jpg?v=1777666757"},{"product_id":"wa-grinder-10pack-4-1-2-flexible-80-grinding-wheel-for-metal-depressed-center-for-angle-grinder-1-8-thickness-7-8-arbor-max-13300-rpm-grit-80","title":"4-1\/2\" x 1\/8\" x 7\/8\" Flexible Grinding Wheels, 80 Grit, for Metal \u0026 Stainless Steel","description":"\u003cp class=\"wa-rating-line\"\u003e\u003cstrong\u003eCustomer rating:\u003c\/strong\u003e 4.5 out of 5 from 58 customer ratings on our online marketplace store (November 2026).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-grain concentration for aggressive grinding action and smoothly running wheels, with more flexibility than a standard grinding wheel.\u003c\/li\u003e\n\u003cli\u003eDurable blend of refined zirconia and aluminum oxide for ultra-quick grinding and finishing, increasing productivity.\u003c\/li\u003e\n\u003cli\u003eWorks on a wide variety of metals — efficient removal on ferrous and non-ferrous metals without clogging or loading. Extremely effective on rusted metal and mill scale. Compatible with angle grinders.\u003c\/li\u003e\n\u003cli\u003eProduces less noise and vibration than conventional grinding wheels.\u003c\/li\u003e\n\u003cli\u003eDiamond-cut pattern allows flexible grinding on flat, curved, concave, and convex surfaces with high removal and cool grinding.\u003c\/li\u003e\n\u003cli\u003eSIZE - 4-1\/2\" diameter, 1\/8\" thickness, 7\/8\" arbor (for metal)\u003c\/li\u003e\n\u003cli\u003ePACKAGE - 10 PCS\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What are these grinding wheels for?\u003c\/strong\u003e\u003cbr\u003eA: Fast stock removal, weld grinding, edge beveling, and surface prep on metal and stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I cut with a grinding wheel?\u003c\/strong\u003e\u003cbr\u003eA: No — use a cut-off wheel for cutting. Grinding wheels are for grinding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: Standard angle grinders matching the diameter and arbor listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is a depressed-center wheel?\u003c\/strong\u003e\u003cbr\u003eA: The offset center lets you grind at an angle while keeping the nut clear of the work.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"10 PC","offer_id":47870712185053,"sku":"Y1-7FO9-ALJL","price":9.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/3b8423e3.jpg?v=1777666760"},{"product_id":"wa-grinder-10pack-4-1-2-flexible-60-grinding-wheel-for-metal-zirconia-grain-1-8-thickness-7-8-arbor-depressed-center-for-angle-grinder-max-13300-rpm-4-grit60","title":"4-1\/2\" x 1\/8\" x 7\/8\" Flexible Zirconia Grinding Wheels, 60 Grit","description":"\u003cp class=\"wa-rating-line\"\u003e\u003cstrong\u003eCustomer rating:\u003c\/strong\u003e 4.3 out of 5 from 79 customer ratings on our online marketplace store (November 2026).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHIGH QUALITY - High-grain concentration for aggressive grinding action and smoothly running wheels, with more flexibility than a standard grinding wheel.\u003c\/li\u003e\n\u003cli\u003eMATERIAL - Durable blend of refined zirconia and aluminum oxide for ultra-quick grinding and finishing.\u003c\/li\u003e\n\u003cli\u003eWIDE APPLICATION - Efficient removal on all ferrous and non-ferrous metals without clogging or loading. Extremely effective on rusted metal and mill scale. Compatible with angle grinders.\u003c\/li\u003e\n\u003cli\u003eSPECIALITY - Produces less noise and vibration than conventional grinding wheels.\u003c\/li\u003e\n\u003cli\u003eSIZE - 4-1\/2\" diameter, 1\/8\" thickness, 7\/8\" arbor, 60 grit.\u003c\/li\u003e\n\u003cli\u003ePACKAGE - 10 PACK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What are these grinding wheels for?\u003c\/strong\u003e\u003cbr\u003eA: Fast stock removal, weld grinding, edge beveling, and surface prep on metal and stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I cut with a grinding wheel?\u003c\/strong\u003e\u003cbr\u003eA: No — use a cut-off wheel for cutting. Grinding wheels are for grinding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What tool do these fit?\u003c\/strong\u003e\u003cbr\u003eA: Standard angle grinders matching the diameter and arbor listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is a depressed-center wheel?\u003c\/strong\u003e\u003cbr\u003eA: The offset center lets you grind at an angle while keeping the nut clear of the work.\u003c\/p\u003e\u003ch2\u003eWhy choose Whitby Abrasives\u003c\/h2\u003e\u003cp\u003eWhitby Abrasives Inc. is a Canadian supplier of professional grinding, cutting, sanding, and finishing abrasives. We focus on consistent quality, fair pricing, and fast shipping across Canada so fabricators, welders, woodworkers, contractors, and DIYers get abrasives that perform job after job. Have a question about sizing or the right grit for your project? Our team is happy to help.\u003c\/p\u003e","brand":"Whitby Abrasives","offers":[{"title":"10 PC","offer_id":47964402385117,"sku":"T6-LMCQ-4Z4I","price":11.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2693\/0141\/files\/f711d127.jpg?v=1777666760"}],"url":"https:\/\/whitbyabrasives.ca\/collections\/grinding-wheels-4-1-2-inch.oembed","provider":"Whitby Abrasives Inc.","version":"1.0","type":"link"}